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Nuclear Physics B185 (1981) 233-238 O North-Holland Publishing Company
 

Summary: Nuclear Physics B185 (1981) 233-238
O North-Holland Publishing Company
GRAVITATIONAL EFFECTS ON THE SU(5) BREAKING PHASE
TRANSITION FOR A COLEMAN-WEINBERG POTENTIAL
L.F. ABBOTT1
CERN, Geneva, Switzerland
Received 30 January 1981
(Revised 12 March 1981)
The gravitational coupling R&2plays a crucial role in determining the fate of the symmetric,
high temperature state in a grand unified model with Coleman-Weinberg type symmetry breaking.
Ifthis term enters in the lagrangian with a negative sign,itdrives the SU(5)breaking phase transition
at a temperature of about 101°GeV. If it enters with a positive sign, and in particular with the
coefficient i which is required for a conformally invariant classical theory, this term prevents the
phase transition from being completed, at least until temperatures are reached for which the SU(5)
coupling becomes large.
1. Introduction
In the standard big bang cosmology, the early Universe is characterized by very
high temperatures at which the gauge symmetries of electroweak and grand unified
(GUT) models were presumably unbroken. As the Universe cooled, phase tran-
sitions took place which brought these theories into their present spontaneously

  

Source: Abbott, Laurence - Center for Neurobiology and Behavior & Department of Physiology and Cellular Biophysics, Columbia University

 

Collections: Biology and Medicine